let QRCode = {};
(function() {
	/**
	 * 获取单个字符的utf8编码
	 * unicode BMP平面约65535个字符
	 * @param {num} code
	 * return {array}
	 */
	function unicodeFormat8(code) {
		// 1 byte
		var c0, c1, c2;
		if (code < 128) {
			return [code];
			// 2 bytes
		} else if (code < 2048) {
			c0 = 192 + (code >> 6);
			c1 = 128 + (code & 63);
			return [c0, c1];
			// 3 bytes
		} else {
			c0 = 224 + (code >> 12);
			c1 = 128 + (code >> 6 & 63);
			c2 = 128 + (code & 63);
			return [c0, c1, c2];
		}
	}
	/**
	 * 获取字符串的utf8编码字节串
	 * @param {string} string
	 * @return {array}
	 */
	function getUTF8Bytes(string) {
		var utf8codes = [];
		for (var i = 0; i < string.length; i++) {
			var code = string.charCodeAt(i);
			var utf8 = unicodeFormat8(code);
			for (var j = 0; j < utf8.length; j++) {
				utf8codes.push(utf8[j]);
			}
		}
		return utf8codes;
	}
	/**
	 * 二维码算法实现
	 * @param {string} data              要编码的信息字符串
	 * @param {num} errorCorrectLevel 纠错等级
	 */
	function QRCodeAlg(data, errorCorrectLevel) {
		this.typeNumber = -1; //版本
		this.errorCorrectLevel = errorCorrectLevel;
		this.modules = null; //二维矩阵，存放最终结果
		this.moduleCount = 0; //矩阵大小
		this.dataCache = null; //数据缓存
		this.rsBlocks = null; //版本数据信息
		this.totalDataCount = -1; //可使用的数据量
		this.data = data;
		this.utf8bytes = getUTF8Bytes(data);
		this.make();
	}
	QRCodeAlg.prototype = {
		constructor: QRCodeAlg,
		/**
		 * 获取二维码矩阵大小
		 * @return {num} 矩阵大小
		 */
		getModuleCount: function() {
			return this.moduleCount;
		},
		/**
		 * 编码
		 */
		make: function() {
			this.getRightType();
			this.dataCache = this.createData();
			this.createQrcode();
		},
		/**
		 * 设置二位矩阵功能图形
		 * @param  {bool} test 表示是否在寻找最好掩膜阶段
		 * @param  {num} maskPattern 掩膜的版本
		 */
		makeImpl: function(maskPattern) {
			this.moduleCount = this.typeNumber * 4 + 17;
			this.modules = new Array(this.moduleCount);
			for (var row = 0; row < this.moduleCount; row++) {
				this.modules[row] = new Array(this.moduleCount);
			}
			this.setupPositionProbePattern(0, 0);
			this.setupPositionProbePattern(this.moduleCount - 7, 0);
			this.setupPositionProbePattern(0, this.moduleCount - 7);
			this.setupPositionAdjustPattern();
			this.setupTimingPattern();
			this.setupTypeInfo(true, maskPattern);
			if (this.typeNumber >= 7) {
				this.setupTypeNumber(true);
			}
			this.mapData(this.dataCache, maskPattern);
		},
		/**
		 * 设置二维码的位置探测图形
		 * @param  {num} row 探测图形的中心横坐标
		 * @param  {num} col 探测图形的中心纵坐标
		 */
		setupPositionProbePattern: function(row, col) {
			for (var r = -1; r <= 7; r++) {
				if (row + r <= -1 || this.moduleCount <= row + r) continue;
				for (var c = -1; c <= 7; c++) {
					if (col + c <= -1 || this.moduleCount <= col + c) continue;
					if ((0 <= r && r <= 6 && (c == 0 || c == 6)) || (0 <= c && c <= 6 && (r == 0 || r ==
							6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4)) {
						this.modules[row + r][col + c] = true;
					} else {
						this.modules[row + r][col + c] = false;
					}
				}
			}
		},
		/**
		 * 创建二维码
		 * @return {[type]} [description]
		 */
		createQrcode: function() {
			var minLostPoint = 0;
			var pattern = 0;
			var bestModules = null;
			for (var i = 0; i < 8; i++) {
				this.makeImpl(i);
				var lostPoint = QRUtil.getLostPoint(this);
				if (i == 0 || minLostPoint > lostPoint) {
					minLostPoint = lostPoint;
					pattern = i;
					bestModules = this.modules;
				}
			}
			this.modules = bestModules;
			this.setupTypeInfo(false, pattern);
			if (this.typeNumber >= 7) {
				this.setupTypeNumber(false);
			}
		},
		/**
		 * 设置定位图形
		 * @return {[type]} [description]
		 */
		setupTimingPattern: function() {
			for (var r = 8; r < this.moduleCount - 8; r++) {
				if (this.modules[r][6] != null) {
					continue;
				}
				this.modules[r][6] = (r % 2 == 0);
				if (this.modules[6][r] != null) {
					continue;
				}
				this.modules[6][r] = (r % 2 == 0);
			}
		},
		/**
		 * 设置矫正图形
		 * @return {[type]} [description]
		 */
		setupPositionAdjustPattern: function() {
			var pos = QRUtil.getPatternPosition(this.typeNumber);
			for (var i = 0; i < pos.length; i++) {
				for (var j = 0; j < pos.length; j++) {
					var row = pos[i];
					var col = pos[j];
					if (this.modules[row][col] != null) {
						continue;
					}
					for (var r = -2; r <= 2; r++) {
						for (var c = -2; c <= 2; c++) {
							if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) {
								this.modules[row + r][col + c] = true;
							} else {
								this.modules[row + r][col + c] = false;
							}
						}
					}
				}
			}
		},
		/**
		 * 设置版本信息（7以上版本才有）
		 * @param  {bool} test 是否处于判断最佳掩膜阶段
		 * @return {[type]}      [description]
		 */
		setupTypeNumber: function(test) {
			var bits = QRUtil.getBCHTypeNumber(this.typeNumber);
			for (var i = 0; i < 18; i++) {
				var mod = (!test && ((bits >> i) & 1) == 1);
				this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
				this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
			}
		},
		/**
		 * 设置格式信息（纠错等级和掩膜版本）
		 * @param  {bool} test
		 * @param  {num} maskPattern 掩膜版本
		 * @return {}
		 */
		setupTypeInfo: function(test, maskPattern) {
			var data = (QRErrorCorrectLevel[this.errorCorrectLevel] << 3) | maskPattern;
			var bits = QRUtil.getBCHTypeInfo(data);
			// vertical
			for (var i = 0; i < 15; i++) {
				var mod = (!test && ((bits >> i) & 1) == 1);
				if (i < 6) {
					this.modules[i][8] = mod;
				} else if (i < 8) {
					this.modules[i + 1][8] = mod;
				} else {
					this.modules[this.moduleCount - 15 + i][8] = mod;
				}
				// horizontal
				var mod = (!test && ((bits >> i) & 1) == 1);
				if (i < 8) {
					this.modules[8][this.moduleCount - i - 1] = mod;
				} else if (i < 9) {
					this.modules[8][15 - i - 1 + 1] = mod;
				} else {
					this.modules[8][15 - i - 1] = mod;
				}
			}
			// fixed module
			this.modules[this.moduleCount - 8][8] = (!test);
		},
		/**
		 * 数据编码
		 * @return {[type]} [description]
		 */
		createData: function() {
			var buffer = new QRBitBuffer();
			var lengthBits = this.typeNumber > 9 ? 16 : 8;
			buffer.put(4, 4); //添加模式
			buffer.put(this.utf8bytes.length, lengthBits);
			for (var i = 0, l = this.utf8bytes.length; i < l; i++) {
				buffer.put(this.utf8bytes[i], 8);
			}
			if (buffer.length + 4 <= this.totalDataCount * 8) {
				buffer.put(0, 4);
			}
			// padding
			while (buffer.length % 8 != 0) {
				buffer.putBit(false);
			}
			// padding
			while (true) {
				if (buffer.length >= this.totalDataCount * 8) {
					break;
				}
				buffer.put(QRCodeAlg.PAD0, 8);
				if (buffer.length >= this.totalDataCount * 8) {
					break;
				}
				buffer.put(QRCodeAlg.PAD1, 8);
			}
			return this.createBytes(buffer);
		},
		/**
		 * 纠错码编码
		 * @param  {buffer} buffer 数据编码
		 * @return {[type]}
		 */
		createBytes: function(buffer) {
			var offset = 0;
			var maxDcCount = 0;
			var maxEcCount = 0;
			var length = this.rsBlock.length / 3;
			var rsBlocks = new Array();
			for (var i = 0; i < length; i++) {
				var count = this.rsBlock[i * 3 + 0];
				var totalCount = this.rsBlock[i * 3 + 1];
				var dataCount = this.rsBlock[i * 3 + 2];
				for (var j = 0; j < count; j++) {
					rsBlocks.push([dataCount, totalCount]);
				}
			}
			var dcdata = new Array(rsBlocks.length);
			var ecdata = new Array(rsBlocks.length);
			for (var r = 0; r < rsBlocks.length; r++) {
				var dcCount = rsBlocks[r][0];
				var ecCount = rsBlocks[r][1] - dcCount;
				maxDcCount = Math.max(maxDcCount, dcCount);
				maxEcCount = Math.max(maxEcCount, ecCount);
				dcdata[r] = new Array(dcCount);
				for (var i = 0; i < dcdata[r].length; i++) {
					dcdata[r][i] = 0xff & buffer.buffer[i + offset];
				}
				offset += dcCount;
				var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
				var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
				var modPoly = rawPoly.mod(rsPoly);
				ecdata[r] = new Array(rsPoly.getLength() - 1);
				for (var i = 0; i < ecdata[r].length; i++) {
					var modIndex = i + modPoly.getLength() - ecdata[r].length;
					ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
				}
			}
			var data = new Array(this.totalDataCount);
			var index = 0;
			for (var i = 0; i < maxDcCount; i++) {
				for (var r = 0; r < rsBlocks.length; r++) {
					if (i < dcdata[r].length) {
						data[index++] = dcdata[r][i];
					}
				}
			}
			for (var i = 0; i < maxEcCount; i++) {
				for (var r = 0; r < rsBlocks.length; r++) {
					if (i < ecdata[r].length) {
						data[index++] = ecdata[r][i];
					}
				}
			}
			return data;

		},
		/**
		 * 布置模块，构建最终信息
		 * @param  {} data
		 * @param  {} maskPattern
		 * @return {}
		 */
		mapData: function(data, maskPattern) {
			var inc = -1;
			var row = this.moduleCount - 1;
			var bitIndex = 7;
			var byteIndex = 0;
			for (var col = this.moduleCount - 1; col > 0; col -= 2) {
				if (col == 6) col--;
				while (true) {
					for (var c = 0; c < 2; c++) {
						if (this.modules[row][col - c] == null) {
							var dark = false;
							if (byteIndex < data.length) {
								dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
							}
							var mask = QRUtil.getMask(maskPattern, row, col - c);
							if (mask) {
								dark = !dark;
							}
							this.modules[row][col - c] = dark;
							bitIndex--;
							if (bitIndex == -1) {
								byteIndex++;
								bitIndex = 7;
							}
						}
					}
					row += inc;
					if (row < 0 || this.moduleCount <= row) {
						row -= inc;
						inc = -inc;
						break;
					}
				}
			}
		}
	};
	/**
	 * 填充字段
	 */
	QRCodeAlg.PAD0 = 0xEC;
	QRCodeAlg.PAD1 = 0x11;
	//---------------------------------------------------------------------
	// 纠错等级对应的编码
	//---------------------------------------------------------------------
	var QRErrorCorrectLevel = [1, 0, 3, 2];
	//---------------------------------------------------------------------
	// 掩膜版本
	//---------------------------------------------------------------------
	var QRMaskPattern = {
		PATTERN000: 0,
		PATTERN001: 1,
		PATTERN010: 2,
		PATTERN011: 3,
		PATTERN100: 4,
		PATTERN101: 5,
		PATTERN110: 6,
		PATTERN111: 7
	};
	//---------------------------------------------------------------------
	// 工具类
	//---------------------------------------------------------------------
	var QRUtil = {
		/*
		每个版本矫正图形的位置
		 */
		PATTERN_POSITION_TABLE: [
			[],
			[6, 18],
			[6, 22],
			[6, 26],
			[6, 30],
			[6, 34],
			[6, 22, 38],
			[6, 24, 42],
			[6, 26, 46],
			[6, 28, 50],
			[6, 30, 54],
			[6, 32, 58],
			[6, 34, 62],
			[6, 26, 46, 66],
			[6, 26, 48, 70],
			[6, 26, 50, 74],
			[6, 30, 54, 78],
			[6, 30, 56, 82],
			[6, 30, 58, 86],
			[6, 34, 62, 90],
			[6, 28, 50, 72, 94],
			[6, 26, 50, 74, 98],
			[6, 30, 54, 78, 102],
			[6, 28, 54, 80, 106],
			[6, 32, 58, 84, 110],
			[6, 30, 58, 86, 114],
			[6, 34, 62, 90, 118],
			[6, 26, 50, 74, 98, 122],
			[6, 30, 54, 78, 102, 126],
			[6, 26, 52, 78, 104, 130],
			[6, 30, 56, 82, 108, 134],
			[6, 34, 60, 86, 112, 138],
			[6, 30, 58, 86, 114, 142],
			[6, 34, 62, 90, 118, 146],
			[6, 30, 54, 78, 102, 126, 150],
			[6, 24, 50, 76, 102, 128, 154],
			[6, 28, 54, 80, 106, 132, 158],
			[6, 32, 58, 84, 110, 136, 162],
			[6, 26, 54, 82, 110, 138, 166],
			[6, 30, 58, 86, 114, 142, 170]
		],
		G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
		G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
		G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
		/*
		BCH编码格式信息
		 */
		getBCHTypeInfo: function(data) {
			var d = data << 10;
			while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
				d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
			}
			return ((data << 10) | d) ^ QRUtil.G15_MASK;
		},
		/*
		BCH编码版本信息
		 */
		getBCHTypeNumber: function(data) {
			var d = data << 12;
			while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
				d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
			}
			return (data << 12) | d;
		},
		/*
		获取BCH位信息
		 */
		getBCHDigit: function(data) {
			var digit = 0;
			while (data != 0) {
				digit++;
				data >>>= 1;
			}
			return digit;
		},
		/*
		获取版本对应的矫正图形位置
		 */
		getPatternPosition: function(typeNumber) {
			return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
		},
		/*
		掩膜算法
		 */
		getMask: function(maskPattern, i, j) {
			switch (maskPattern) {
				case QRMaskPattern.PATTERN000:
					return (i + j) % 2 == 0;
				case QRMaskPattern.PATTERN001:
					return i % 2 == 0;
				case QRMaskPattern.PATTERN010:
					return j % 3 == 0;
				case QRMaskPattern.PATTERN011:
					return (i + j) % 3 == 0;
				case QRMaskPattern.PATTERN100:
					return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
				case QRMaskPattern.PATTERN101:
					return (i * j) % 2 + (i * j) % 3 == 0;
				case QRMaskPattern.PATTERN110:
					return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
				case QRMaskPattern.PATTERN111:
					return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
				default:
					throw new Error("bad maskPattern:" + maskPattern);
			}
		},
		/*
		获取RS的纠错多项式
		 */
		getErrorCorrectPolynomial: function(errorCorrectLength) {
			var a = new QRPolynomial([1], 0);
			for (var i = 0; i < errorCorrectLength; i++) {
				a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
			}
			return a;
		},
		/*
		获取评价
		 */
		getLostPoint: function(qrCode) {
			var moduleCount = qrCode.getModuleCount(),
				lostPoint = 0,
				darkCount = 0;
			for (var row = 0; row < moduleCount; row++) {
				var sameCount = 0;
				var head = qrCode.modules[row][0];
				for (var col = 0; col < moduleCount; col++) {
					var current = qrCode.modules[row][col];
					//level 3 评价
					if (col < moduleCount - 6) {
						if (current && !qrCode.modules[row][col + 1] && qrCode.modules[row][col + 2] &&
							qrCode.modules[row][col + 3] && qrCode.modules[row][col + 4] && !qrCode.modules[
								row][col + 5] && qrCode.modules[row][col + 6]) {
							if (col < moduleCount - 10) {
								if (qrCode.modules[row][col + 7] && qrCode.modules[row][col + 8] && qrCode
									.modules[row][col + 9] && qrCode.modules[row][col + 10]) {
									lostPoint += 40;
								}
							} else if (col > 3) {
								if (qrCode.modules[row][col - 1] && qrCode.modules[row][col - 2] && qrCode
									.modules[row][col - 3] && qrCode.modules[row][col - 4]) {
									lostPoint += 40;
								}
							}
						}
					}
					//level 2 评价
					if ((row < moduleCount - 1) && (col < moduleCount - 1)) {
						var count = 0;
						if (current) count++;
						if (qrCode.modules[row + 1][col]) count++;
						if (qrCode.modules[row][col + 1]) count++;
						if (qrCode.modules[row + 1][col + 1]) count++;
						if (count == 0 || count == 4) {
							lostPoint += 3;
						}
					}
					//level 1 评价
					if (head ^ current) {
						sameCount++;
					} else {
						head = current;
						if (sameCount >= 5) {
							lostPoint += (3 + sameCount - 5);
						}
						sameCount = 1;
					}
					//level 4 评价
					if (current) {
						darkCount++;
					}
				}
			}
			for (var col = 0; col < moduleCount; col++) {
				var sameCount = 0;
				var head = qrCode.modules[0][col];
				for (var row = 0; row < moduleCount; row++) {
					var current = qrCode.modules[row][col];
					//level 3 评价
					if (row < moduleCount - 6) {
						if (current && !qrCode.modules[row + 1][col] && qrCode.modules[row + 2][col] &&
							qrCode.modules[row + 3][col] && qrCode.modules[row + 4][col] && !qrCode.modules[
								row + 5][col] && qrCode.modules[row + 6][col]) {
							if (row < moduleCount - 10) {
								if (qrCode.modules[row + 7][col] && qrCode.modules[row + 8][col] && qrCode
									.modules[row + 9][col] && qrCode.modules[row + 10][col]) {
									lostPoint += 40;
								}
							} else if (row > 3) {
								if (qrCode.modules[row - 1][col] && qrCode.modules[row - 2][col] && qrCode
									.modules[row - 3][col] && qrCode.modules[row - 4][col]) {
									lostPoint += 40;
								}
							}
						}
					}
					//level 1 评价
					if (head ^ current) {
						sameCount++;
					} else {
						head = current;
						if (sameCount >= 5) {
							lostPoint += (3 + sameCount - 5);
						}
						sameCount = 1;
					}
				}
			}
			// LEVEL4
			var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
			lostPoint += ratio * 10;
			return lostPoint;
		}

	};
	//---------------------------------------------------------------------
	// QRMath使用的数学工具
	//---------------------------------------------------------------------
	var QRMath = {
		/*
		将n转化为a^m
		 */
		glog: function(n) {
			if (n < 1) {
				throw new Error("glog(" + n + ")");
			}
			return QRMath.LOG_TABLE[n];
		},
		/*
		将a^m转化为n
		 */
		gexp: function(n) {
			while (n < 0) {
				n += 255;
			}
			while (n >= 256) {
				n -= 255;
			}
			return QRMath.EXP_TABLE[n];
		},
		EXP_TABLE: new Array(256),
		LOG_TABLE: new Array(256)

	};
	for (var i = 0; i < 8; i++) {
		QRMath.EXP_TABLE[i] = 1 << i;
	}
	for (var i = 8; i < 256; i++) {
		QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath
			.EXP_TABLE[i - 8];
	}
	for (var i = 0; i < 255; i++) {
		QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
	}
	//---------------------------------------------------------------------
	// QRPolynomial 多项式
	//---------------------------------------------------------------------
	/**
	 * 多项式类
	 * @param {Array} num   系数
	 * @param {num} shift a^shift
	 */
	function QRPolynomial(num, shift) {
		if (num.length == undefined) {
			throw new Error(num.length + "/" + shift);
		}
		var offset = 0;
		while (offset < num.length && num[offset] == 0) {
			offset++;
		}
		this.num = new Array(num.length - offset + shift);
		for (var i = 0; i < num.length - offset; i++) {
			this.num[i] = num[i + offset];
		}
	}
	QRPolynomial.prototype = {
		get: function(index) {
			return this.num[index];
		},
		getLength: function() {
			return this.num.length;
		},
		/**
		 * 多项式乘法
		 * @param  {QRPolynomial} e 被乘多项式
		 * @return {[type]}   [description]
		 */
		multiply: function(e) {
			var num = new Array(this.getLength() + e.getLength() - 1);
			for (var i = 0; i < this.getLength(); i++) {
				for (var j = 0; j < e.getLength(); j++) {
					num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
				}
			}
			return new QRPolynomial(num, 0);
		},
		/**
		 * 多项式模运算
		 * @param  {QRPolynomial} e 模多项式
		 * @return {}
		 */
		mod: function(e) {
			var tl = this.getLength(),
				el = e.getLength();
			if (tl - el < 0) {
				return this;
			}
			var num = new Array(tl);
			for (var i = 0; i < tl; i++) {
				num[i] = this.get(i);
			}
			while (num.length >= el) {
				var ratio = QRMath.glog(num[0]) - QRMath.glog(e.get(0));

				for (var i = 0; i < e.getLength(); i++) {
					num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
				}
				while (num[0] == 0) {
					num.shift();
				}
			}
			return new QRPolynomial(num, 0);
		}
	};

	//---------------------------------------------------------------------
	// RS_BLOCK_TABLE
	//---------------------------------------------------------------------
	/*
	二维码各个版本信息[块数, 每块中的数据块数, 每块中的信息块数]
	 */
	var RS_BLOCK_TABLE = [
		// L
		// M
		// Q
		// H
		// 1
		[1, 26, 19],
		[1, 26, 16],
		[1, 26, 13],
		[1, 26, 9],

		// 2
		[1, 44, 34],
		[1, 44, 28],
		[1, 44, 22],
		[1, 44, 16],

		// 3
		[1, 70, 55],
		[1, 70, 44],
		[2, 35, 17],
		[2, 35, 13],

		// 4
		[1, 100, 80],
		[2, 50, 32],
		[2, 50, 24],
		[4, 25, 9],

		// 5
		[1, 134, 108],
		[2, 67, 43],
		[2, 33, 15, 2, 34, 16],
		[2, 33, 11, 2, 34, 12],

		// 6
		[2, 86, 68],
		[4, 43, 27],
		[4, 43, 19],
		[4, 43, 15],

		// 7
		[2, 98, 78],
		[4, 49, 31],
		[2, 32, 14, 4, 33, 15],
		[4, 39, 13, 1, 40, 14],

		// 8
		[2, 121, 97],
		[2, 60, 38, 2, 61, 39],
		[4, 40, 18, 2, 41, 19],
		[4, 40, 14, 2, 41, 15],

		// 9
		[2, 146, 116],
		[3, 58, 36, 2, 59, 37],
		[4, 36, 16, 4, 37, 17],
		[4, 36, 12, 4, 37, 13],

		// 10
		[2, 86, 68, 2, 87, 69],
		[4, 69, 43, 1, 70, 44],
		[6, 43, 19, 2, 44, 20],
		[6, 43, 15, 2, 44, 16],

		// 11
		[4, 101, 81],
		[1, 80, 50, 4, 81, 51],
		[4, 50, 22, 4, 51, 23],
		[3, 36, 12, 8, 37, 13],

		// 12
		[2, 116, 92, 2, 117, 93],
		[6, 58, 36, 2, 59, 37],
		[4, 46, 20, 6, 47, 21],
		[7, 42, 14, 4, 43, 15],

		// 13
		[4, 133, 107],
		[8, 59, 37, 1, 60, 38],
		[8, 44, 20, 4, 45, 21],
		[12, 33, 11, 4, 34, 12],

		// 14
		[3, 145, 115, 1, 146, 116],
		[4, 64, 40, 5, 65, 41],
		[11, 36, 16, 5, 37, 17],
		[11, 36, 12, 5, 37, 13],

		// 15
		[5, 109, 87, 1, 110, 88],
		[5, 65, 41, 5, 66, 42],
		[5, 54, 24, 7, 55, 25],
		[11, 36, 12],

		// 16
		[5, 122, 98, 1, 123, 99],
		[7, 73, 45, 3, 74, 46],
		[15, 43, 19, 2, 44, 20],
		[3, 45, 15, 13, 46, 16],

		// 17
		[1, 135, 107, 5, 136, 108],
		[10, 74, 46, 1, 75, 47],
		[1, 50, 22, 15, 51, 23],
		[2, 42, 14, 17, 43, 15],

		// 18
		[5, 150, 120, 1, 151, 121],
		[9, 69, 43, 4, 70, 44],
		[17, 50, 22, 1, 51, 23],
		[2, 42, 14, 19, 43, 15],

		// 19
		[3, 141, 113, 4, 142, 114],
		[3, 70, 44, 11, 71, 45],
		[17, 47, 21, 4, 48, 22],
		[9, 39, 13, 16, 40, 14],

		// 20
		[3, 135, 107, 5, 136, 108],
		[3, 67, 41, 13, 68, 42],
		[15, 54, 24, 5, 55, 25],
		[15, 43, 15, 10, 44, 16],

		// 21
		[4, 144, 116, 4, 145, 117],
		[17, 68, 42],
		[17, 50, 22, 6, 51, 23],
		[19, 46, 16, 6, 47, 17],

		// 22
		[2, 139, 111, 7, 140, 112],
		[17, 74, 46],
		[7, 54, 24, 16, 55, 25],
		[34, 37, 13],

		// 23
		[4, 151, 121, 5, 152, 122],
		[4, 75, 47, 14, 76, 48],
		[11, 54, 24, 14, 55, 25],
		[16, 45, 15, 14, 46, 16],

		// 24
		[6, 147, 117, 4, 148, 118],
		[6, 73, 45, 14, 74, 46],
		[11, 54, 24, 16, 55, 25],
		[30, 46, 16, 2, 47, 17],

		// 25
		[8, 132, 106, 4, 133, 107],
		[8, 75, 47, 13, 76, 48],
		[7, 54, 24, 22, 55, 25],
		[22, 45, 15, 13, 46, 16],

		// 26
		[10, 142, 114, 2, 143, 115],
		[19, 74, 46, 4, 75, 47],
		[28, 50, 22, 6, 51, 23],
		[33, 46, 16, 4, 47, 17],

		// 27
		[8, 152, 122, 4, 153, 123],
		[22, 73, 45, 3, 74, 46],
		[8, 53, 23, 26, 54, 24],
		[12, 45, 15, 28, 46, 16],

		// 28
		[3, 147, 117, 10, 148, 118],
		[3, 73, 45, 23, 74, 46],
		[4, 54, 24, 31, 55, 25],
		[11, 45, 15, 31, 46, 16],

		// 29
		[7, 146, 116, 7, 147, 117],
		[21, 73, 45, 7, 74, 46],
		[1, 53, 23, 37, 54, 24],
		[19, 45, 15, 26, 46, 16],

		// 30
		[5, 145, 115, 10, 146, 116],
		[19, 75, 47, 10, 76, 48],
		[15, 54, 24, 25, 55, 25],
		[23, 45, 15, 25, 46, 16],

		// 31
		[13, 145, 115, 3, 146, 116],
		[2, 74, 46, 29, 75, 47],
		[42, 54, 24, 1, 55, 25],
		[23, 45, 15, 28, 46, 16],

		// 32
		[17, 145, 115],
		[10, 74, 46, 23, 75, 47],
		[10, 54, 24, 35, 55, 25],
		[19, 45, 15, 35, 46, 16],

		// 33
		[17, 145, 115, 1, 146, 116],
		[14, 74, 46, 21, 75, 47],
		[29, 54, 24, 19, 55, 25],
		[11, 45, 15, 46, 46, 16],

		// 34
		[13, 145, 115, 6, 146, 116],
		[14, 74, 46, 23, 75, 47],
		[44, 54, 24, 7, 55, 25],
		[59, 46, 16, 1, 47, 17],

		// 35
		[12, 151, 121, 7, 152, 122],
		[12, 75, 47, 26, 76, 48],
		[39, 54, 24, 14, 55, 25],
		[22, 45, 15, 41, 46, 16],

		// 36
		[6, 151, 121, 14, 152, 122],
		[6, 75, 47, 34, 76, 48],
		[46, 54, 24, 10, 55, 25],
		[2, 45, 15, 64, 46, 16],

		// 37
		[17, 152, 122, 4, 153, 123],
		[29, 74, 46, 14, 75, 47],
		[49, 54, 24, 10, 55, 25],
		[24, 45, 15, 46, 46, 16],

		// 38
		[4, 152, 122, 18, 153, 123],
		[13, 74, 46, 32, 75, 47],
		[48, 54, 24, 14, 55, 25],
		[42, 45, 15, 32, 46, 16],

		// 39
		[20, 147, 117, 4, 148, 118],
		[40, 75, 47, 7, 76, 48],
		[43, 54, 24, 22, 55, 25],
		[10, 45, 15, 67, 46, 16],

		// 40
		[19, 148, 118, 6, 149, 119],
		[18, 75, 47, 31, 76, 48],
		[34, 54, 24, 34, 55, 25],
		[20, 45, 15, 61, 46, 16]
	];

	/**
	 * 根据数据获取对应版本
	 * @return {[type]} [description]
	 */
	QRCodeAlg.prototype.getRightType = function() {
		for (var typeNumber = 1; typeNumber < 41; typeNumber++) {
			var rsBlock = RS_BLOCK_TABLE[(typeNumber - 1) * 4 + this.errorCorrectLevel];
			if (rsBlock == undefined) {
				throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + this
					.errorCorrectLevel);
			}
			var length = rsBlock.length / 3;
			var totalDataCount = 0;
			for (var i = 0; i < length; i++) {
				var count = rsBlock[i * 3 + 0];
				var dataCount = rsBlock[i * 3 + 2];
				totalDataCount += dataCount * count;
			}
			var lengthBytes = typeNumber > 9 ? 2 : 1;
			if (this.utf8bytes.length + lengthBytes < totalDataCount || typeNumber == 40) {
				this.typeNumber = typeNumber;
				this.rsBlock = rsBlock;
				this.totalDataCount = totalDataCount;
				break;
			}
		}
	};

	//---------------------------------------------------------------------
	// QRBitBuffer
	//---------------------------------------------------------------------
	function QRBitBuffer() {
		this.buffer = new Array();
		this.length = 0;
	}
	QRBitBuffer.prototype = {
		get: function(index) {
			var bufIndex = Math.floor(index / 8);
			return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1);
		},
		put: function(num, length) {
			for (var i = 0; i < length; i++) {
				this.putBit(((num >>> (length - i - 1)) & 1));
			}
		},
		putBit: function(bit) {
			var bufIndex = Math.floor(this.length / 8);
			if (this.buffer.length <= bufIndex) {
				this.buffer.push(0);
			}
			if (bit) {
				this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
			}
			this.length++;
		}
	};



	// xzedit
	let qrcodeAlgObjCache = [];
	/**
	 * 二维码构造函数，主要用于绘制
	 * @param  {参数列表} opt 传递参数
	 * @return {}
	 */
	QRCode = function(opt) {
		//设置默认参数
		this.options = {
			text: '',
			size: 256,
			correctLevel: 3,
			background: '#ffffff',
			foreground: '#000000',
			pdground: '#000000',
			image: '',
			imageSize: 30,
			canvasId: opt.canvasId,
			context: opt.context,
			usingComponents: opt.usingComponents,
			showLoading: opt.showLoading,
			loadingText: opt.loadingText,
		};
		if (typeof opt === 'string') { // 只编码ASCII字符串
			opt = {
				text: opt
			};
		}
		if (opt) {
			for (var i in opt) {
				this.options[i] = opt[i];
			}
		}
		//使用QRCodeAlg创建二维码结构
		var qrCodeAlg = null;
		for (var i = 0, l = qrcodeAlgObjCache.length; i < l; i++) {
			if (qrcodeAlgObjCache[i].text == this.options.text && qrcodeAlgObjCache[i].text.correctLevel == this
				.options.correctLevel) {
				qrCodeAlg = qrcodeAlgObjCache[i].obj;
				break;
			}
		}
		if (i == l) {
			qrCodeAlg = new QRCodeAlg(this.options.text, this.options.correctLevel);
			qrcodeAlgObjCache.push({
				text: this.options.text,
				correctLevel: this.options.correctLevel,
				obj: qrCodeAlg
			});
		}
		/**
		 * 计算矩阵点的前景色
		 * @param {Obj} config
		 * @param {Number} config.row 点x坐标
		 * @param {Number} config.col 点y坐标
		 * @param {Number} config.count 矩阵大小
		 * @param {Number} config.options 组件的options
		 * @return {String}
		 */
		let getForeGround = function(config) {
			var options = config.options;
			if (options.pdground && (
					(config.row > 1 && config.row < 5 && config.col > 1 && config.col < 5) ||
					(config.row > (config.count - 6) && config.row < (config.count - 2) && config.col > 1 &&
						config.col < 5) ||
					(config.row > 1 && config.row < 5 && config.col > (config.count - 6) && config.col < (
						config.count - 2))
				)) {
				return options.pdground;
			}
			return options.foreground;
		}
		// 创建canvas
		let createCanvas = function(options) {
			if (options.showLoading) {
				uni.showLoading({
					title: options.loadingText,
					// #ifndef MP-ALIPAY
					mask: true,
					// #endif
				});
			}
			var ctx = uni.createCanvasContext(options.canvasId, options.context);
			var count = qrCodeAlg.getModuleCount();
			var ratioSize = options.size;
			var ratioImgSize = options.imageSize;
			//计算每个点的长宽
			var tileW = (ratioSize / count).toPrecision(4);
			var tileH = (ratioSize / count).toPrecision(4);
			//绘制
			for (var row = 0; row < count; row++) {
				for (var col = 0; col < count; col++) {
					var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW));
					var h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW));
					var foreground = getForeGround({
						row: row,
						col: col,
						count: count,
						options: options
					});
					ctx.setFillStyle(qrCodeAlg.modules[row][col] ? foreground : options.background);
					ctx.fillRect(Math.round(col * tileW), Math.round(row * tileH), w, h);
				}
			}
			if (options.image) {
				var x = Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
				var y = Number(((ratioSize - ratioImgSize) / 2).toFixed(2));
				drawRoundedRect(ctx, x, y, ratioImgSize, ratioImgSize, 2, 6, true, true)
				ctx.drawImage(options.image, x, y, ratioImgSize, ratioImgSize);
				// 画圆角矩形
				function drawRoundedRect(ctxi, x, y, width, height, r, lineWidth, fill, stroke) {
					ctxi.setLineWidth(lineWidth);
					ctxi.setFillStyle(options.background);
					ctxi.setStrokeStyle(options.background);
					ctxi.beginPath(); // draw top and top right corner 
					ctxi.moveTo(x + r, y);
					ctxi.arcTo(x + width, y, x + width, y + r,
						r); // draw right side and bottom right corner 
					ctxi.arcTo(x + width, y + height, x + width - r, y + height,
						r); // draw bottom and bottom left corner 
					ctxi.arcTo(x, y + height, x, y + height - r, r); // draw left and top left corner 
					ctxi.arcTo(x, y, x + r, y, r);
					ctxi.closePath();
					if (fill) {
						ctxi.fill();
					}
					if (stroke) {
						ctxi.stroke();
					}
				}
			}
			setTimeout(() => {
				ctx.draw(true, () => {
					// 保存到临时区域
					setTimeout(() => {
						uni.canvasToTempFilePath({
							width: options.width,
							height: options.height,
							destWidth: options.width,
							destHeight: options.height,
							canvasId: options.canvasId,
							quality: Number(1),
							success: function(res) {
								if (options.cbResult) {
									options.cbResult(res.tempFilePath)
								}
							},
							fail: function(res) {
								if (options.cbResult) {
									options.cbResult(res)
								}
							},
							complete: function() {
								if (options.showLoading) {
									uni.hideLoading();
								}
							},
						}, options.context);
					}, options.text.length + 100);
				});
			}, options.usingComponents ? 0 : 150);
		}
		createCanvas(this.options);
		// 空判定
		let empty = function(v) {
			let tp = typeof v,
				rt = false;
			if (tp == "number" && String(v) == "") {
				rt = true
			} else if (tp == "undefined") {
				rt = true
			} else if (tp == "object") {
				if (JSON.stringify(v) == "{}" || JSON.stringify(v) == "[]" || v == null) rt = true
			} else if (tp == "string") {
				if (v == "" || v == "undefined" || v == "null" || v == "{}" || v == "[]") rt = true
			} else if (tp == "function") {
				rt = false
			}
			return rt
		}
	};
	QRCode.prototype.clear = function(fn) {
		var ctx = uni.createCanvasContext(this.options.canvasId, this.options.context)
		ctx.clearRect(0, 0, this.options.size, this.options.size)
		ctx.draw(false, () => {
			if (fn) {
				fn()
			}
		})
	};
})()

export default QRCode
